Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface, showing a first embodiment of our new design;

FIG. 2 is a front view, showing a second embodiment thereof;

FIG. 3 is a front view, showing a third embodiment thereof;

FIG. 4 is a front view, showing a fourth embodiment thereof; and,

FIG. 5 is a front view, showing a fifth embodiment thereof.

The outer rectangular broken line showing a display screen and all other broken lines showing portions of the graphical user interface are included for the purpose of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 